| 浅埋隧洞爆破施工引起的振动效应 |
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| 作者单位： | ;1.中铁隧道集团一处有限公司;2.泰山学院机械与工程学院;3.山东科技大学土木工程与建筑学院;4.日照市建筑设计研究院有限公司 |
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| 摘 要： | 为了减少隧道爆破施工产生的振动危害的影响,对临沂城30万t供水工程隧洞爆破施工产生的振动效应进行了研究。采用量纲分析法推导出考虑高程的爆破振动速度计算公式,并结合实测数据研究了爆破振动的高程放大效应;采用数值模拟的方法研究了爆破振动空洞效应。研究结果表明:垂直向存在爆破振动速度高程放大效应,需重点监测和控制;振速放大系数随着距爆源水平距离的增大呈现先增大后减小的趋势;随着浅埋隧洞埋深的不断增大,地表振速放大系数逐渐变小;对于地表振速放大系数,总体上,垂直向略大于水平向。
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| 关 键 词： | 爆破施工 振动速度 高程放大效应 空洞效应 |
Vibration effect caused by blasting in shallow tunnel |
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| Affiliation: | ,China Railway Tunnel Group Yichu Co.,Ltd.,College of Machinery and Engineering,Taishan University,College of Civil Engineering and Architecture,Shandong University of Science and Technology,Rizhao Architectural Design Academy Co.,Ltd.,ENN Energy Holdings Limited |
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| Abstract: | In order to reduce the impact of vibration damage caused by tunnel blasting,the vibration effect of blasting construction of 300 000 twater supply project in Linyi city was studied.The formula of blasting vibration velocity considering the elevation was deduced by dimension analysis method.The heightening effect of blasting vibration was studied with the measured data,and the cavity effect of blasting vibration was studied by numerical simulation.The results showed that there was a high magnification effect of blasting vibration velocity in the vertical direction,which needed to be monitored and controlled.The magnification coefficient of vibration velocity first increased and then decreased with the increase of distance from the blasting source.The surface magnification factor become smaller gradually;for the surface vibration velocity amplification factor,the vertical direction was slightly greater than the horizontal direction. |
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| Keywords: | blasting construction vibration velocity amplification effect on elevation hollow effect |
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